Skiving-machine



E. J. RAY.

SKIVING MACHINE APPLICATION HLED JAN. 30, 1920.

5:5 nnnnHuuHHnnd Patented Oct. 4, 1921.

V UNITED STATES.

PATENT OFFICE.

EUGENE J. BAY, OF BEVERLY, MASSACHUSETTS, ASSIGNOB T0 UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION NEW JERSEY.

' sxrvme-Mncnmn Specification of Letters Patent. P t t 0 1;; 4, 1921,

Application filed January 30, 1920. Serial No. 55,094.

To all whom it may concern r Be it known that I, EUGENE J. RAY, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Skiving-liiachines; and Ido hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which itappertains to make and use the same.

The invention relates to skiving machines, and more particularly to machines of this character which comprise a rotary tubular skiving knife, a presser foot, and a feed roll, arranged to ated upon, and feeding it against the knife.

The objectof the 1nvent1on is to so molsten the knife of a mach ne of this character that it will operate successfuly upon rubber,

rubber stock or similar plastic or semi-plastic material. To this end means 18 provided ,fcrapplying a thin filmof moisture to the knife at its edge and for such distance back from its edge so that therewill be no ad hesion of the stock to the periphery of the knife as it passes from under the presser foot at the point of operation of the knife.

The means which is preferably utilized for supplying the moisture so that it will be evenly and uniformly distributed over the requisite surface both within and without the knife edge, and in such quantities that it will not be thrown off to an objectionable extent by centrifugal force, comprises a spring operated carrier adapted to present a moistening pad to the edge and outer surface of the knife and to press'it continuously against the periphery of the knife.

I in suitable quantities by a pipe from which the water drips onto the pad, and in such case un form drip of the water may be secured by plugging the end of the pipe with sponge.

A preferred form of the invention is shown in the drawings, in which Figure 1 is a front elevation showing so. much of a skiving machine as is necessary to illustrate cooperate with the presser foot in positioning the material'to be operthe application of the present invention thereto. Fig. 2 is a side elevation and Fig- 3 is a detail section view on line 3, 3, Fig. l.

In the drawings theinvention is shown applied to a skiving machine similar in construction and mode of operation to the machine shown and described in Patent No. 1,301,283, April 22, 1919. This machine is provided with a rotary tubular knife 2, a yielding feed 170ll4 and with a presser foot whichis-supported in fixed position, and determines the angle of the skiving. -The presser foot is shown in the form of a conical roll 6, mounted on an adjustable lever 8, which is in turn mounted on a vertically adjustable slide 10, corresponding to the presser foot slide of the above patent;

In embodying the preferred form of the inventionin this machine a moistening pad carrier is arranged below the knife and in position to'press a moistening pad against the surface of the knife at and back of its edge. The carrier shown is in the form of a trough 12, pivoted at one end to a'bracket 14 and supported by a spring 16. The bracket may be conveniently secured in proper position with relation t0-the knife by screws 18 and 20, which engage opposite sides of a flange 22011 the machine frame. The trough is so arranged that it underlies the knife edge and the upper edges of the trough are curved to correspond approximately to the curvature of the knife so that the rear side edge will lie close to and conform approximately to the surface of the knife. The moistenin'v pad 24 is car- .r1ed 1n the trough. and its upper surface conforms substantially to the outer surface of the knife. The pad is pressed continuously against the surface of the knife by the action of the spring 16 and since the edge of the knifelies between the sides of the trough the pad also embraces the edge of the knife to some extent and applies a. film of moisture to the surface immediately within the edge, as well as to the outer surface for some distance back from the edge. The pad is preferably a sponge pad since it has been found that sponge is not only well suited for retainin supply of moisturebut that it also will apply the moisture to the knife in the form of a thin,

film and that it is also of such, a character that it will not be quickly rendered lnef fective by continued contact with the rapidly rotating knife. V

ater is supplied to the pad by a supply pipe 26, the mouth of which is preferably plugged ivith sponge 28 so that the Water may drip uniformly from the pipe onto the pad. any suitable valve for regulating the supply of water thereto.

lVhile it is preferred to employ the specific construction shown and described in applying'tlie invention to the machine of the patent above referred to it would be understood that this construction and arrangement is not essential to the broader ed to the construction of the machine in a the carrier to press a pad carried thereby which the inventionis to be embodied.

vWhat 1S claimed 1s: e V p 1. A skivlng machine havlng, 1n combination, a tubular knife, a feed roll, a presser foot, a movable carrier for presenting a moistening. pad to the edge and outer surface of the knife, and a SPIJIIQI acting on against the periphery of the knife.

The'pipe may be provided with edge.

tion, a tubular knife, afeed roll, a presser foot a 'movable carrier fonoresentin a inoistening pad to the edge and outer surface of the knife, a spring acting on the carrier to press the pad against the edge and periphery of the knife, a pipe for delivering liquid onto the pad, and a sponge plug in the mouth of the pipe vfor securing a uniform drip onto the-pad. I

4. A skiving machine lniv1ng,'1n comb1- nation, a tubular knife, a feed roll, a presser foot, a pivoted trough arranged to under- 'lie the knife edge and having its 'upper edges curved vto correspond approximately to ,the curvature of the knife, a moistening padflin the trough, and a spring supporting the trough and pressing the pad against the surface of the knife at and back @of its Etienne J. RA-Y1. 

